If I buy this and choose the 600 with the sunmaster metalhalide lamp can I fit the sont t sodium lamp I already have to it when I want to flick to flowering?

depends on the ballast youre using

thanks for the reply sky, luckly I didnt just buy it then

heres a link showing the one im going for. http://www.greenshorticulture.co.uk/Grow-L...w-Light-567.asp


I think the one I need will be the £164.99 one but im not 100 %. Just to confirm, I am after the light that will allow me to use a metal halide bulb when vegging, but a high pressure sodium one when I decide to flower. Litterally by unscrewing the metal halide one and the screwing in the hps one. Does that make sense

I'd buy this

http://www.greenshorticulture.co.uk/Grow-L...allast-1325.asp £100

http://www.greenshorticulture.co.uk/Grow-L...lectors-923.asp £60

Diamond chuck downs loads of heat I know I bought one from greens (I'd buy a parabolic but they're not in stock)

and

the sunmaster metal halide £40

£200 but you get a digital ballast which does make some difference and the supernova will yield very similar to the diamond without 1/2 the heat issues.

If you have you heart set on a diamond angle you air intake ducting up through the canopy and point at the diamond it reaally sorts the temps out.

In my experience the biggest gain with a digital ballast is when using MH bulbs they do genuinely seem brighter. Digi's don't flicker either which must make some difference.

would anyone disagree with that.

This place use to be far more helpfull, only tutu and jiffa seem to have the time or can be bothered to give me there views. Jeez I just want to make a good choice of light but no ones helping me out. very dissapointed as i was reccomended to this site.

The answer to your original question is on the page you linked to... did you bother reading it before you asked?

sorry mate but I dont get what your saying

wouldnt bother with the Metal halide bulb, just use the dual spectrum bulbs. and you wont need to worry about changing lamps.

plus MH lamps tend to make taller plants than the dual spectrum lamps keep them small and dense not tall and sparse

cheers mate.

but what light

He means the page at greenshorticulture clearly says blah, blah "takes sodium and halide lamps"

kool beanz i see it now :-)

now what do i get the diamond or the supa nova


i like the ballast tutu suggested

Not my experience at all my grolux was far behind my cheapo 5000K MH for squatness and speed of growth.

7200k bulbs would be far better, which is what I recomended him.

No need to cheap out on bulbs IMH, changing them is to easy even in a cool tube to not consider it.

The grow in my sig is only 4.5 foot tall including over 1 foot in pot height vegged (For 4 weeks) under 600w MH and grown under 1000w HPS.

I have some huge plants just wide rather than tall.

youve only posted a link to one light and another link for a reflector. expensive ones I may add I only paid £110 for a 600w full kit. shop around

I understand what you mean on cheaping out but if your just starting out then you dont really need to spend so much on lights

My. Whining. How attractive.

This is a parabolic you can find them through google, greens have sold out.

I think buying the right kit in the first place sets the grow off to a nice start.

Is that a reflector where the bulb lies vertically rather than horizontally?

yes obvisously 50000 lumens is less than 72000 lumens but as an electrician and taught about light spectrums. If you give the plants red spectrum in veg they stay smaller as the plant is looking for blue spectrum at this stage so red spectrum keep them small. Plants go in search of light so it is only sense that a bigger bulb with higher lumens is going to keep them short also.

if you get a 400w MH and a 400w son and do a comparrison grow the ones in the son will be smaller. but if you up the lumens of the light then it is obviously going to make a diffrence in size.

Plus vertical lying reflectors are less efficient than horizontal lying reflectors. As the light has to bounce off the reflector before it reaches the plants and not just straight on to the plants. So in my opion you have bought the wrong gear. but hey diffrent strokes for diffrent folks

5000k, 7200k are the colour temps, 5000k is similar to kitchen fluro's 7200k light an early bright morning in spring.

I did do a comparison using 2 600w, identical ballast, reflectors, ventilation. My conclusion was MH is better for squat plant HPS for stretching. HPS is brighter though and grolux and dual spectrum will be brighter than MH. They both have place in a grow room and dual spectrum's could be a good first 2 weeks of flower bulb.

That's a 1000w HPS in the parabolic in a 120cm tent.

look no disrespect but I could go all anal and post links and stuff for you to look at. But I really cant be arsed. I had it out with a guy on Sensi's forum about this very same subject and he was as deluded as you are, Hps making them stretch in vegg stage its impossible if other factors are correct.

The main reason being: in Veg stage the plants look for blue spectrum. So Giving them red spectrum makes them defficent this keeping them small.

Sorry I thot you had got it wrong when you put 50000k, I thot you were referring to lumens as 50000 lumens is roughly what comes out of a 400w HPS

if you want me to go all anal and want the links just say and I will post them tomora when am not stoned :-)

ED......

Haha haha well I checked my sourcies and guess what??? I must be fucking stoned as I when I looked at the post on sensi's forum I was saying that they stretch under HPS and with MH they stay short with small distances between nodes.

So I apologise for being a TIT and I eat my words I cant believe I got it mixed up after giving that guy on sensi's forum it proper I get my own info wrong.

But I am correct about vertical reflectors not beig as efficient as horizontal reflectors. vertical ones use the reflector to defuse the light before it hits the plants. it gives a more even spread of light but it loses lumens due to it being defused.
horizontal reflectors: only half of the light is reflected as the other half goes straight on to the plants but there is a greater chance of hot spots

I forgot contactor + timer very important, DO NOT USE TIMER ON ITS OWN!!!!